Fetish/ˈfetɪʃ/ Definition 1 of 3Pro Tip 1/2Casual Usage Often used informally to indicate a strong preference, not always a true 'fetish'. She has a fetish for iced lattes. Pro Tip 2/2Not Always Sexual Can refer to non-sexual interests. It's about intensity of interest, not the nature of interest. Bob has a fetish for vintage comic books.